Provided is an apparatus for adjusting an envelope signal delay in an envelope-tracking power amplifier. The apparatus includes: an envelope signal providing unit configured to provide an envelope signal; a variable negative group delay unit configured to adjust a group delay of the envelope signal received from the envelope signal providing unit and output the adjusted envelope signal; an envelope modulator configured to modulate the envelope signal outputted from the variable negative group delay unit; a group delay difference detecting unit configured to detect a group delay difference between the envelope signal which is outputted from the envelope signal providing unit and the envelope signal which is outputted from the envelope modulator; and a control signal generating unit configured to generate a control signal to control a group delay value of the variable negative group delay unit according to the group delay difference.

An audio loudness data collection module collects and stores audio data. The data can be stored for a first time period. A monitoring system can access and store the audio data collected and stored by the loudness data collection module according to a second time period. The stored audio data can be processed and displayed to a user in a number of ways. The data can also be used to provide loudness data control. For example, a loudness data control module can perform an audio AGC function to control audio loudness.

A hearing loss correction system which is mobile compatible and comprises of a mechanism, wherein the mobile device module when in the OFF condition is used as a hearing assistive and amplification device. The hearing loss correction system comprises a microphone unit, a speaker unit and a mobile phone inbuilt application processor to operatively connect the microphone unit with the speaker unit for recording environmental sound signal though the microphone unit and storage free direct streaming of said recorded sound signal to the speaker unit upon real time amplification and background noise suppression.

In some embodiments, an audio amplifier can be controlled by a method that includes generating an enable signal based on a masking sound in an audio signal, and controlling a mode transition of the audio amplifier between a current source mode and a voltage source mode based on the enable signal. The mode transition of the audio amplifier can result in an artifact sound, the generating of the enable signal and the controlling of the mode transition can be achieved such that the artifact sound is substantially masked by the masking sound.

An example method includes receiving data indicating a configuration of one or more playback devices. The one or more playback devices may include one or more transducers. The method further includes, based on the received data, associating each of one or more audio streams respectively with at least one transducer of the one or more transducers. The method further includes generating the one or more audio streams and sending at least one of the generated one or more audio streams to each of the one or more playback devices. An example non-transitory computer readable medium and an example computing device related to the example method are also disclosed herein.

Method for carrying out a morphing process, wherein an output parameter relating to the output of an audio signal outputted into an interior via an audio output device is changed.

In accordance with an embodiment, a method includes determining an amplitude of an input signal provided by a capacitive signal source, compressing the input signal in an analog domain to form a compressed analog signal based on the determined amplitude, converting the compressed analog signal to a compressed digital signal, and decompressing the digital signal in a digital domain to form a decompressed digital signal. In an embodiment, compressing the analog signal includes adjusting a first gain of an amplifier coupled to the capacitive signal source, and decompressing the digital signal comprises adjusting a second gain of a digital processing block.

Described herein is an audio device with a microphone which may adapt the audio output volume of a speaker by either increasing or decreasing output volume based on an audio input volume from a user and a distance from the user to the audio device. The audio device may also adapt its output volume to lower the audio output based on detecting one or more interruptions including occupancy and acoustic sounds.

A system for controlling an audio device that includes a memory storing an audio processing application and a processor that is coupled to the memory. When executing the audio processing application, the processor is configured to determine an amplifier parameter based on an audio signal, encode the amplifier parameter to generate an audio waveform, and transmit the audio waveform to an amplifier.

What is described is a system for outputting audio signals having a first output device for outputting audio signals having predeterminable parameter values of a first set of settable parameters, a data storage for storing parameter values, and an administration device. Thus, the administration device accesses the data storage and searches for stored parameter values for a set of parameters which is equal or similar to the first set of parameters. In addition, in case of having found stored parameter values, the administration device transfers the parameter values and/or parameter values determined therefrom to the first output device.